var request;
var divToShow, prevDiv
prevDiv = '';

function getAllHeaders(url, divFunc){
	divToShow = divFunc	

	//alert(divToShow + ' -- ' + prevDiv);
	
	var divTemp;
	if (prevDiv)
		{
			divTemp = document.getElementById(prevDiv);
			divTemp.innerHTML = '';
			if (divToShow == prevDiv)
			{
				prevDiv = '';
				return;
			}
		}
		
	var divterms = document.getElementById(divToShow);
		
    if(divterms) {
			divterms.innerHTML='<img src="../images/loading.gif" border="0"><span style="font-size:10px; font-family:arial;">...loading</span>';			
        }	
        
    httpRequest("GET",url,true);
}

//event handler for XMLHttpRequest
function handleResponse(){
    try{
        if(request.readyState == 4){
            if(request.status == 200){
                /*All headers received as a single stringt*/
                var headers = request.responseText;
				var divterms = document.getElementById(divToShow);
				var divActive 
                
                if(divterms) {
                divterms.innerHTML = headers                                
				prevDiv = divToShow                
                    }
            } else {
                //request.status is 503  if the application isn't available; 500 if the application has a bug
                alert(request.status);
                alert("A problem occurred with communicating between the XMLHttpRequest object and the server program.");
            }
        }//end outer if
    } catch (err)   {
        alert("It does not appear that the server is available for this application. Please"+
              " try again very soon. \nError: "+err.message);

    }
}

/* Initialize a Request object that is already constructed */
function initReq(reqType,url,bool){
    try{
        /* Specify the function that will handle the HTTP response */
        request.onreadystatechange=handleResponse;
        request.open(reqType,url,bool);
        request.send(null);
    } catch (errv) {

        alert(
                "The application cannot contact the server at the moment. "+
                "It may be a problem with cross-domain restrictions." );
    }
}

/* Wrapper function for constructing a Request object.
 Parameters:
  reqType: The HTTP request type such as GET or POST.
  url: The URL of the server program.
  asynch: Whether to send the request asynchronously or not. */
function httpRequest(reqType,url,asynch){
    //Mozilla-based browsers
    if(window.XMLHttpRequest){
        request = new XMLHttpRequest();
    } else if (window.ActiveXObject){
        request=new ActiveXObject("Msxml2.XMLHTTP");
        if (! request){
            request=new ActiveXObject("Microsoft.XMLHTTP");
        }
     }
    //the request could still be null if neither ActiveXObject
    //initializations succeeded
    if(request){
       initReq(reqType,url,asynch);
    }  else {
        alert("Your browser does not permit the use of all "+
        "of this application's features!");}
}